Even though it sounds pretty gross, how awesome would it be if this works in humans?!

Researchers at Dartmouth College in New Hampshire have found that a certain parasite in cat poop can shrink cancerous tumors in mice. And eventually, they might be able to harness its cancer-killing abilities for people too.

The parasite lives in their intestines, and it's called toxoplasma gondii. (Pronounced tock-so-plasma GAWN-dee-eye.)

It can also infect people, but our immune system usually fights it off. What they've found is that it stimulates the same immune responses that help fight off cancer.

In mice, they used a genetically modified version to shrink tumors from melanoma and ovarian cancer, and increased their rate of survival. (Live Science)